Physcia stellaris is a species of lichen commonly found in various regions, including the Comunidad Valenciana. This lichen belongs to the family Physciaceae and is well-known for its aesthetic, star-like appearance.

Characteristics:

• Appearance: Physcia stellaris has a foliose form, resembling a collection of tiny leaves radiating outwards, often forming star-like clusters.
• Color: The thallus is typically grey to whitish, with a pale upper surface that contrasts with its darker lower surface.
• Growth: This lichen often populates the bark of trees in both urban and rural settings, thriving in areas with adequate sunlight and moisture.

Ecological Role:

• Biodiversity Indicator: As a bioindicator, Physcia stellaris plays a crucial role in monitoring environmental quality, particularly air pollution levels.
• Symbiotic Relationship: Like other lichens, it engages in a symbiotic relationship between fungi and algae, contributing to nutrient cycles in its ecosystem.

The presence of Physcia stellaris in the Comunidad Valenciana adds to the region's rich biological diversity, offering insights into ecological health and environmental conditions.